Bug 13162 - Label batch editor title sorting by default, rather then label number

Bug 13162 - Label batch editor title sorting by default, rather then label number

The label batches editor has always sorted by the order the items were
added to a batch. However, it is now sorting by title. This should be
remedied.

Test Plan:
1) Create a label batch
2) Note the items are in order of title ( summary )
3) Apply this patch
4) Refresh the page, not the items are now sorted by label number

Tiny patch. Works as expected.
Signed-off-by: Marc Véron <veron@veron.ch>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Passes tests, works as described.

Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>